Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f8adf17177466a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-15 05:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3511bb8e90ee0aa457a8988532a2441f SHA-1: dd10d5283610471b196bf90bd742977e4698ae10 SHA-256: f8f8adf17177466ab8ee9b5ee5ff7d20a42861f56f5b8ab734b9936bc92863b8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a workshop manual and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=aston+martin+v12+vantage+workshop+manual
    • http://derarez.ipsmusicfestival.com/uploads/1/3/2/7/132712615/b2eb26aecba71.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/sosanux.pdf
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/gradle_tutorial_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/negamixinikumotixuvud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/vamomes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/histoire_de_l_apiculture.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/negapiluwojowinoxosojali.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/foxobawategobot.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/lawudabudejowadiruti.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/panij.pdf
    • https://cdn.shopify.com/s/files/1/0439/4418/1928/files/84460686560.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/25340352284.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/61416436250.pdf
    • https://cdn.shopify.com/s/files/1/0431/7688/6431/files/60789958265.pdf
    • https://cdn.shopify.com/s/files/1/0449/4082/0635/files/belebajeb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fe0.bin
383a3ec9aaa89ed59cb70b0dddf467b143d79fa157d1d95608c83c4579249b72
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE0 5620 bytes
font_01_sfnt_off000072f0.bin
35953386feefc6fa8bd229eca2b597c98f539cabf5802dd10d9c8570bc678929
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F0 10212 bytes